Item_Project::prepareInputForAdd PHP Method

    function prepareInputForAdd($input)
    {
        // Avoid duplicate entry
        if (countElementsInTable($this->getTable(), ['projects_id' => $input['projects_id'], 'itemtype' => $input['itemtype'], 'items_id' => $input['items_id']]) > 0) {
            return false;
        }
        return parent::prepareInputForAdd($input);
    }